MLA

Johnson, Robin Stanley, and R. S Johnson. Singular Perturbation Theory. Dordrecht: Springer US, 2005.

APA

Johnson, R. Stanley, & Johnson, R. S. (2005). Singular Perturbation Theory. Dordrecht: Springer US.

Chicago

Johnson, Robin Stanley, and R. S Johnson. Singular Perturbation Theory. Dordrecht: Springer US, 2005.